According to research by the Dutch Animal Health Service (GD), over one-third, or 36%, of all drinking water in Denmark's poultry houses is of poor quality.

While poultry farmers are critical regarding animal feed, water quality doesn't get enough attention according to GD. Poor water quality can lead to decreased performance in the birds.

According to calculation by the GD, water that is contaminated with moulds and yeasts can cost the farmer DKK12,000 (US$2,129.08) per year (based on a farm with 30,000 layers). A bacteriological contamination of water on a farm of 30,000 broilers can lead to a loss of DKK2,000 (US$354.85) per round.

With regard to human health protection and the poultry industry, the Philippine Department of Agriculture (DA) has also imposed a temporary ban last month on the entry of birds and poultry products from two countries that includes Denmark.

Official reports from the World Organization on Animal Health or Office International des Epizooties (OIE) confirmed outbreaks of the dreaded bird flu virus in Denmark and Bhutan.